1996 Promax 225 HELP

[CPDAD]

Hello, I am reaching out for possible help with my sons 1996 Promax 225. on a Mirage 18 ( not my first post just forgot everything and had to re register )

what I know
Compression 130 all 6
Spark Great
starts and idles amazing
top rpm with 28p over 7K



BUT it has a flat spot over 1k for a few seconds then the power hits and its runs great
Every time the throttle is back down and re applied the spot exist no matter what the RPM

I herd the TPS but can I test that without a merc test tool ?
I also thought sure sounds like reeds but no idea how to verify that

Any help would be greatly appreciated
Thanks

[25two.stroke]

You can kinda test the TPS without a merc test tool. Just measure resistance with an ohm meter and compare to one (maybe someone on here) who has one that runs good. I don't know that the merc book lays out what it should be.

This can test if it is good at specific positions but not necessarily a smooth transition from closed to WOT. If theres a hiccup or delay at a certain point it could cause issues that you will never see with an ohms test.

[CPDAD]

You can kinda test the TPS without a merc test tool. Just measure resistance with an ohm meter and compare to one (maybe someone on here) who has one that runs good. I don't know that the merc book lays out what it should be.

This can test if it is good at specific positions but not necessarily a smooth transition from closed to WOT. If theres a hiccup or delay at a certain point it could cause issues that you will never see with an ohms test.




Makes since - thanks

[25two.stroke]

Shoot, I've never heard of Murrieta...Hopefully you figure it out, if not I'll have to make a stop with my merc tester next time I drive down that way...